Bug 1082444 - Handle additional events when FxA EntrySheet is displayed. r=ferjm

  * Specifically, listen for 'home', 'holdhome', and 'activityrequesting', and
    when those are caught, if the EntrySheet is open, close it.
  * Also, don't try to open the EntrySheet if navigator.onLine is false; show
    an error message instead.
Bug 1073806 - In Gaia, bypass system-resize in LayoutManager in window resize event if Keyboard is showing and we've just changed orientation

Conflicts:
	apps/system/js/layout_manager.js
	apps/system/test/unit/layout_manager_test.js
Bug 1044484 - Add an external tag to gaiatest manifests to denote tests use of external internet resources
Merge pull request #26714 from zacc/bug_1044484_v2.0

Bug 1044484 - Add an external tag to gaiatest manifests to denote tests ...
Merge pull request #26707 from mnjul/bug_1073806_v2.0

Bug 1073806 - In Gaia, bypass system-resize in LayoutManager in window resize event if Keyboard is showing and we've just changed orientation
Bug 1105857 - [Messages] User doesn't receive any notification about incoming message if native modal dialog is shown. r=schung
Bug 1108493 - [Window Management]You can't open task manager page soon after you close all recent apps
Bug 1105977 - [FFOS2.0][Woodduck][SMS] The discard function is wrong

cherry-picked from 5e0a980ff72b83ee4fd23fa8066773d3471e88d4
Bug 1106956 - Remove Notifications from IDLE TEXT during starting gaia.
Merge pull request #26777 from luke-chang/1108493_v2.0m_cannot_open_task_manager

Bug 1108493 - [Window Management]You can't open task manager page soon after you close all recent apps, r=alive
Merge pull request #26811 from luke-chang/1105977_v2.0m_sms_unsent_discard_useless

Bug 1105977 - [FFOS2.0][Woodduck][SMS] The discard function is wrong, r=steveck
Bug 1059224 - Update launch method with manifest_url option. r=dhunt r=bsilverberg a=test-only
Bump gaiatest-v2.0 version to 0.4. a=test-only
Merge pull request #26549 from azasypkin/v2.0m-bug-1105857-alert-custom-dialog

Bug 1105857 - [Messages] User doesn't receive any notification about incoming message if native modal dialog is shown. r=schung
Merge pull request #26754 from davidflanagan/bug1096839

Bug 1096839: add BMP support to shared/js/media/image_size.js to fix Gal... r=pdahiya
Merge branch 'v2.0' into v2.0m

Conflicts:
	apps/system/js/layout_manager.js
Merge pull request #26867 from weilonge/seanlee/STK/v2.0m/Bug1106956

Bug 1106956 - Remove Notifications from IDLE TEXT during starting gaia. r=frsela